Damage isn’t a huge problem, watches tend to be pretty sturdy and mere scratches aren’t going to hurt resale value in most cases (unless you have them repaired!)
Theft on the other hand is a pretty big concern, I just had a 100k patek ripped off my wrist. I’m very lucky though, the local store manager was sympathetic and managed to help me skip the queue for a (slightly more desirable) replacement, effectively nullifying any financial damage.
Lesson learned, not walking around with uninsured watches no matter how nice the area is. Insurance premiums aren’t too bad though.